Questions from Applied Statistics

Q: Below are recent financial ratios for a random sample of 20 integrated

Below are recent financial ratios for a random sample of 20 integrated health care systems. Operating Margin is total revenue minus total expenses divided by total revenue plus net operating profits....

Q: Assuming independent arrivals with a mean of 2.5 arrivals per

Assuming independent arrivals with a mean of 2.5 arrivals per minute, find the probability that in a given minute there will be (a). exactly 2 arrivals; (b). at least 3 arrivals; (c). fewer than 4...

Q: Consider the following data on 20 chemical reactions, with Y =

Consider the following data on 20 chemical reactions, with Y = chromatographic retention time (seconds) and X = molecular weight (gm/mole). (a) Make a scatter plot. (b) Use Excel to fit the regression...

Q: Set up limits for the R chart, given
= 0

Set up limits for the R chart, given
= 0.82 and n = 6.

Q: Set up limits for the R chart, given
= 12

Set up limits for the R chart, given
= 12 and n = 3.

Q: For an
chart, what percent of sample means should be

For an
chart, what percent of sample means should be (a) within 1 sigma of the centerline; (b) within 2 sigmas of the centerline; (c) within 3 sigmas of the centerline; (d) outside 2 sigmas of the c...

Q: Create control limits for a p chart for a process with π

Create control limits for a p chart for a process with π = .02 and subgroup size n = 500. Is it safe to assume normality? Explain.

Q: Create control limits for a p chart for a process with π

Create control limits for a p chart for a process with π = .50 and subgroup size n = 20. Is it safe to assume normality? Explain.

Q: Create control limits for a p chart for a process with π

Create control limits for a p chart for a process with π = .90 and subgroup size n = 40. Is it safe to assume normality? Explain.

Q: Find the Cp and Cpk indexes for a process with μ =

Find the Cp and Cpk indexes for a process with μ = 720, σ = 1.0, LSL = 715, USL = 725. How would you rate the capability of this process? Explain.